# From dragon!gamgee.acad.emich.edu!dhw Tue Mar 18 01:12:15 1997

# Return-Path: <dragon!gamgee.acad.emich.edu!dhw>

# Message-ID: <m0w6owW-000IDSC@gamgee.acad.emich.edu>

# Date: Mon, 17 Mar 97 20:48 CST

# From: dhw@gamgee.acad.emich.edu (David H. West)

# To: arnold@gnu.ai.mit.edu

# Subject: gawk 3.0.2 bug report (cc of msg to bug-gnu-utils)

# Status: OR

# Content-Length: 869

# X-Lines: 20

# X-Display-Position: 2

# 

# Nature of bug: operation on a pipe side-effects a different pipe.

# Observed-With: gawk 3.0.2, Linux kernel 2.0.28

# Reproduce-By: running the following script, without and with the "close"

#               statement uncommented.

# -----------------cut here--------------------------

BEGIN {FILE1="test1"; FILE2="test2"; 

       print "1\n" > FILE1; close(FILE1);

       print "2\n" > FILE2; close(FILE2); 

       cmd1="cat " FILE1; cmd2="cat " FILE2;

       #end of preparing commands which give easily-predictable output

       while( (cmd1 | getline)==1) { #terminates as file has only 1 line

                                     #and we never close cmd1

          cmd2 | getline L; 

          #BUG: uncommenting the following line causes an infinite loop

          close(cmd2);

          print $0,L;

          }

      }